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GIVEN VECTORS OA=I+J+K;AB=3I-2J+K;BC=I+2J-2K AND CD=2I+J+3K
WE KNOW THAT VECTOR AB =OB-OA
3I-2J+K= OB-( I+J+K)
OB=4I-J+2K
SIMILARLY BC =OC-OB
I+2J-2K=OC-(4I-J+2K)
OC=5I+J
CD=OD-OC
2I+J+3K = OD -(5I+J)
OD=7I+2J+3K
THERE FORE VECTOR OD 7I+2J+3K
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